Combustion oscillations pose considerable threats to scramjets; however, they have rarely been investigated by high-fidelity transient simulations using practical liquid hydrocarbon fuel. Here, flame dynamic evolutions and relevant flow mechanisms in a liquid-kerosene-fueled dual-cavity scramjet combustor are numerically investigated by the improved delayed detached-eddy simulations using the Eulerian–Lagrangian method, with particular emphasis given to the effects of the interaction between fue